SHELL/7.2.3.ps1

$CheckId = "7.2.3"
$Title = "Ensure external content sharing is restricted"
$Level = "L1"
$BenchmarkType = "Automated"

$AllowedValues = @(
    "ExternalUserSharingOnly",
    "ExistingExternalUserSharingOnly",
    "Disabled"
)

try {
    $TenantConfig = Get-SPOTenant -ErrorAction Stop
    $SharingCapability = [string]$TenantConfig.SharingCapability

    $Pass = $AllowedValues -contains $SharingCapability
    $Status = if ($Pass) { "PASS" } else { "FAIL" }

    [pscustomobject]@{
        CheckId = $CheckId
        Title = $Title
        Level = $Level
        BenchmarkType = $BenchmarkType
        Status = $Status
        Pass = $Pass
        Evidence = [pscustomobject]@{
            SharingCapability = $SharingCapability
            AllowedValues = $AllowedValues
            SourceDocument = "CIS_Microsoft_365_Foundations_Benchmark_v6.0.1"
        }
        Error = if ($Pass) { $null } else { "SharingCapability is set to '$SharingCapability'. It must be ExternalUserSharingOnly, ExistingExternalUserSharingOnly, or Disabled." }
        Timestamp = Get-Date
    }
}
catch {
    [pscustomobject]@{
        CheckId = $CheckId
        Title = $Title
        Level = $Level
        BenchmarkType = $BenchmarkType
        Status = "ERROR"
        Pass = $null
        Evidence = [pscustomobject]@{
            AllowedValues = $AllowedValues
            SourceDocument = "CIS_Microsoft_365_Foundations_Benchmark_v6.0.1"
        }
        Error = $_.Exception.Message
        Timestamp = Get-Date
    }
}